Math Problem Statement

The expression for the nth term of a sequence is 4n + 7. What are the first three terms in the sequence? Give your answers in order.

Solution

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textThe image contains the following problem:

The expression for the nn-th term of a sequence is 4n+74n + 7. What are the first three terms in the sequence? Give your answers in order.

To find the first three terms, we simply substitute values of n=1,2,3n = 1, 2, 3 into the expression:

  1. For n=1n = 1: 4(1)+7=4+7=114(1) + 7 = 4 + 7 = 11
  2. For n=2n = 2: 4(2)+7=8+7=154(2) + 7 = 8 + 7 = 15
  3. For n=3n = 3: 4(3)+7=12+7=194(3) + 7 = 12 + 7 = 19

So, the first three terms of the sequence are: 11, 15, and 19.

Would you like further details or have any questions on this?

Here are some related questions you may find interesting:

  1. How would the sequence change if the expression was 5n+35n + 3?
  2. What is the general formula for finding the nn-th term of an arithmetic sequence?
  3. How would you calculate the sum of the first nn terms of an arithmetic sequence?
  4. How does the common difference of an arithmetic sequence relate to the expression for its nn-th term?
  5. How can you determine if a sequence is arithmetic or geometric?

Tip: When identifying terms in a sequence, always substitute the values of nn carefully into the given formula.

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Math Problem Analysis

Mathematical Concepts

Arithmetic Sequences
Substitution in Algebraic Expressions

Formulas

nth term of a sequence: an = 4n + 7

Theorems

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Suitable Grade Level

Grades 6-8